BP Based Adaptive Fuzzy Identification Method for Gyro Random Drift Estimation

The precision of gyro is one of the most important points to decide precision of inertial navigation system and it is mostly effected by the gyro random drift. A kind of BP adaptive fuzzy method using minimum standard deviation estimator to identify gyro random drift is proposed in the paper, and the mathematical model is established. It makes the best of language information and data information, and has the possession of back propagation study. With experiments, the adaptive fuzzy method´s accuracy is proved. The simulation shows that the BP adaptive fuzzy identifying method is of practicable value to liquid floated gyro´s random error identifying.